Merge tag '6.4-rc-smb3-client-fixes-part1' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:

 - deferred close fix for an important case when cached file should be
   closed immediately

 - two fixes for missing locks

 - eight minor cleanup

* tag '6.4-rc-smb3-client-fixes-part1' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: update internal module version number for cifs.ko
  smb3: move some common open context structs to smbfs_common
  smb3: make query_on_disk_id open context consistent and move to common code
  SMB3.1.1: add new tree connect ShareFlags
  cifs: missing lock when updating session status
  SMB3: Close deferred file handles in case of handle lease break
  SMB3: Add missing locks to protect deferred close file list
  cifs: Avoid a cast in add_lease_context()
  cifs: Simplify SMB2_open_init()
  cifs: Simplify SMB2_open_init()
  cifs: Simplify SMB2_open_init()

Author: torvalds

fs/cifs/cifsfs.h

@@ -162,6 +162,6 @@ extern const struct export_operations cifs_export_ops;
 #endif /* CONFIG_CIFS_NFSD_EXPORT */
 
 /* when changing internal version - update following two lines at same time */
-#define SMB3_PRODUCT_BUILD 41
-#define CIFS_VERSION   "2.42"
+#define SMB3_PRODUCT_BUILD 43
+#define CIFS_VERSION   "2.43"
 #endif				/* _CIFSFS_H */

fs/cifs/connect.c

@@ -1916,18 +1916,22 @@ void cifs_put_smb_ses(struct cifs_ses *ses)
 	/* ses_count can never go negative */
 	WARN_ON(ses->ses_count < 0);
 
+	spin_lock(&ses->ses_lock);
 	if (ses->ses_status == SES_GOOD)
 		ses->ses_status = SES_EXITING;
 
-	cifs_free_ipc(ses);
-
 	if (ses->ses_status == SES_EXITING && server->ops->logoff) {
+		spin_unlock(&ses->ses_lock);
+		cifs_free_ipc(ses);
 		xid = get_xid();
 		rc = server->ops->logoff(xid, ses);
 		if (rc)
 			cifs_server_dbg(VFS, "%s: Session Logoff failure rc=%d\n",
 				__func__, rc);
 		_free_xid(xid);
+	} else {
+		spin_unlock(&ses->ses_lock);
+		cifs_free_ipc(ses);
 	}
 
 	spin_lock(&cifs_tcp_ses_lock);

fs/cifs/file.c

@@ -4882,6 +4882,8 @@ void cifs_oplock_break(struct work_struct *work)
 	struct TCP_Server_Info *server = tcon->ses->server;
 	int rc = 0;
 	bool purge_cache = false;
+	struct cifs_deferred_close *dclose;
+	bool is_deferred = false;
 
 	wait_on_bit(&cinode->flags, CIFS_INODE_PENDING_WRITERS,
 			TASK_UNINTERRUPTIBLE);
@@ -4917,6 +4919,20 @@ void cifs_oplock_break(struct work_struct *work)
 		cifs_dbg(VFS, "Push locks rc = %d\n", rc);
 
 oplock_break_ack:
+	/*
+	 * When oplock break is received and there are no active
+	 * file handles but cached, then schedule deferred close immediately.
+	 * So, new open will not use cached handle.
+	 */
+	spin_lock(&CIFS_I(inode)->deferred_lock);
+	is_deferred = cifs_is_deferred_close(cfile, &dclose);
+	spin_unlock(&CIFS_I(inode)->deferred_lock);
+
+	if (!CIFS_CACHE_HANDLE(cinode) && is_deferred &&
+			cfile->deferred_close_scheduled && delayed_work_pending(&cfile->deferred)) {
+		cifs_close_deferred_file(cinode);
+	}
+
 	/*
 	 * releasing stale oplock after recent reconnect of smb session using
 	 * a now incorrect file handle is not a data integrity issue but do

fs/cifs/misc.c

@@ -749,7 +749,9 @@ cifs_close_deferred_file(struct cifsInodeInfo *cifs_inode)
 	list_for_each_entry(cfile, &cifs_inode->openFileList, flist) {
 		if (delayed_work_pending(&cfile->deferred)) {
 			if (cancel_delayed_work(&cfile->deferred)) {
+				spin_lock(&cifs_inode->deferred_lock);
 				cifs_del_deferred_close(cfile);
+				spin_unlock(&cifs_inode->deferred_lock);
 
 				tmp_list = kmalloc(sizeof(struct file_list), GFP_ATOMIC);
 				if (tmp_list == NULL)
@@ -762,7 +764,7 @@ cifs_close_deferred_file(struct cifsInodeInfo *cifs_inode)
 	spin_unlock(&cifs_inode->open_file_lock);
 
 	list_for_each_entry_safe(tmp_list, tmp_next_list, &file_head, list) {
-		_cifsFileInfo_put(tmp_list->cfile, true, false);
+		_cifsFileInfo_put(tmp_list->cfile, false, false);
 		list_del(&tmp_list->list);
 		kfree(tmp_list);
 	}
@@ -780,7 +782,9 @@ cifs_close_all_deferred_files(struct cifs_tcon *tcon)
 	list_for_each_entry(cfile, &tcon->openFileList, tlist) {
 		if (delayed_work_pending(&cfile->deferred)) {
 			if (cancel_delayed_work(&cfile->deferred)) {
+				spin_lock(&CIFS_I(d_inode(cfile->dentry))->deferred_lock);
 				cifs_del_deferred_close(cfile);
+				spin_unlock(&CIFS_I(d_inode(cfile->dentry))->deferred_lock);
 
 				tmp_list = kmalloc(sizeof(struct file_list), GFP_ATOMIC);
 				if (tmp_list == NULL)
@@ -815,7 +819,9 @@ cifs_close_deferred_file_under_dentry(struct cifs_tcon *tcon, const char *path)
 		if (strstr(full_path, path)) {
 			if (delayed_work_pending(&cfile->deferred)) {
 				if (cancel_delayed_work(&cfile->deferred)) {
+					spin_lock(&CIFS_I(d_inode(cfile->dentry))->deferred_lock);
 					cifs_del_deferred_close(cfile);
+					spin_unlock(&CIFS_I(d_inode(cfile->dentry))->deferred_lock);
 
 					tmp_list = kmalloc(sizeof(struct file_list), GFP_ATOMIC);
 					if (tmp_list == NULL)

fs/cifs/smb2pdu.c

@@ -821,7 +821,6 @@ create_posix_buf(umode_t mode)
 static int
 add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode)
 {
-	struct smb2_create_req *req = iov[0].iov_base;
 	unsigned int num = *num_iovec;
 
 	iov[num].iov_base = create_posix_buf(mode);
@@ -830,11 +829,6 @@ add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode)
 	if (iov[num].iov_base == NULL)
 		return -ENOMEM;
 	iov[num].iov_len = sizeof(struct create_posix);
-	if (!req->CreateContextsOffset)
-		req->CreateContextsOffset = cpu_to_le32(
-				sizeof(struct smb2_create_req) +
-				iov[num - 1].iov_len);
-	le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_posix));
 	*num_iovec = num + 1;
 	return 0;
 }
@@ -2069,7 +2063,7 @@ create_reconnect_durable_buf(struct cifs_fid *fid)
 static void
 parse_query_id_ctxt(struct create_context *cc, struct smb2_file_all_info *buf)
 {
-	struct create_on_disk_id *pdisk_id = (struct create_on_disk_id *)cc;
+	struct create_disk_id_rsp *pdisk_id = (struct create_disk_id_rsp *)cc;
 
 	cifs_dbg(FYI, "parse query id context 0x%llx 0x%llx\n",
 		pdisk_id->DiskFileId, pdisk_id->VolumeId);
@@ -2172,23 +2166,18 @@ smb2_parse_contexts(struct TCP_Server_Info *server,
 }
 
 static int
-add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
+add_lease_context(struct TCP_Server_Info *server,
+		  struct smb2_create_req *req,
+		  struct kvec *iov,
 		  unsigned int *num_iovec, u8 *lease_key, __u8 *oplock)
 {
-	struct smb2_create_req *req = iov[0].iov_base;
 	unsigned int num = *num_iovec;
 
 	iov[num].iov_base = server->ops->create_lease_buf(lease_key, *oplock);
 	if (iov[num].iov_base == NULL)
 		return -ENOMEM;
 	iov[num].iov_len = server->vals->create_lease_size;
 	req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
-	if (!req->CreateContextsOffset)
-		req->CreateContextsOffset = cpu_to_le32(
-				sizeof(struct smb2_create_req) +
-				iov[num - 1].iov_len);
-	le32_add_cpu(&req->CreateContextsLength,
-		     server->vals->create_lease_size);
 	*num_iovec = num + 1;
 	return 0;
 }
@@ -2267,18 +2256,12 @@ static int
 add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
 		    struct cifs_open_parms *oparms)
 {
-	struct smb2_create_req *req = iov[0].iov_base;
 	unsigned int num = *num_iovec;
 
 	iov[num].iov_base = create_durable_v2_buf(oparms);
 	if (iov[num].iov_base == NULL)
 		return -ENOMEM;
 	iov[num].iov_len = sizeof(struct create_durable_v2);
-	if (!req->CreateContextsOffset)
-		req->CreateContextsOffset =
-			cpu_to_le32(sizeof(struct smb2_create_req) +
-								iov[1].iov_len);
-	le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
 	*num_iovec = num + 1;
 	return 0;
 }
@@ -2287,7 +2270,6 @@ static int
 add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
 		    struct cifs_open_parms *oparms)
 {
-	struct smb2_create_req *req = iov[0].iov_base;
 	unsigned int num = *num_iovec;
 
 	/* indicate that we don't need to relock the file */
@@ -2297,12 +2279,6 @@ add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
 	if (iov[num].iov_base == NULL)
 		return -ENOMEM;
 	iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
-	if (!req->CreateContextsOffset)
-		req->CreateContextsOffset =
-			cpu_to_le32(sizeof(struct smb2_create_req) +
-								iov[1].iov_len);
-	le32_add_cpu(&req->CreateContextsLength,
-			sizeof(struct create_durable_handle_reconnect_v2));
 	*num_iovec = num + 1;
 	return 0;
 }
@@ -2311,7 +2287,6 @@ static int
 add_durable_context(struct kvec *iov, unsigned int *num_iovec,
 		    struct cifs_open_parms *oparms, bool use_persistent)
 {
-	struct smb2_create_req *req = iov[0].iov_base;
 	unsigned int num = *num_iovec;
 
 	if (use_persistent) {
@@ -2331,11 +2306,6 @@ add_durable_context(struct kvec *iov, unsigned int *num_iovec,
 	if (iov[num].iov_base == NULL)
 		return -ENOMEM;
 	iov[num].iov_len = sizeof(struct create_durable);
-	if (!req->CreateContextsOffset)
-		req->CreateContextsOffset =
-			cpu_to_le32(sizeof(struct smb2_create_req) +
-								iov[1].iov_len);
-	le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
 	*num_iovec = num + 1;
 	return 0;
 }
@@ -2369,18 +2339,12 @@ create_twarp_buf(__u64 timewarp)
 static int
 add_twarp_context(struct kvec *iov, unsigned int *num_iovec, __u64 timewarp)
 {
-	struct smb2_create_req *req = iov[0].iov_base;
 	unsigned int num = *num_iovec;
 
 	iov[num].iov_base = create_twarp_buf(timewarp);
 	if (iov[num].iov_base == NULL)
 		return -ENOMEM;
 	iov[num].iov_len = sizeof(struct crt_twarp_ctxt);
-	if (!req->CreateContextsOffset)
-		req->CreateContextsOffset = cpu_to_le32(
-				sizeof(struct smb2_create_req) +
-				iov[num - 1].iov_len);
-	le32_add_cpu(&req->CreateContextsLength, sizeof(struct crt_twarp_ctxt));
 	*num_iovec = num + 1;
 	return 0;
 }
@@ -2503,19 +2467,13 @@ create_sd_buf(umode_t mode, bool set_owner, unsigned int *len)
 static int
 add_sd_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode, bool set_owner)
 {
-	struct smb2_create_req *req = iov[0].iov_base;
 	unsigned int num = *num_iovec;
 	unsigned int len = 0;
 
 	iov[num].iov_base = create_sd_buf(mode, set_owner, &len);
 	if (iov[num].iov_base == NULL)
 		return -ENOMEM;
 	iov[num].iov_len = len;
-	if (!req->CreateContextsOffset)
-		req->CreateContextsOffset = cpu_to_le32(
-				sizeof(struct smb2_create_req) +
-				iov[num - 1].iov_len);
-	le32_add_cpu(&req->CreateContextsLength, len);
 	*num_iovec = num + 1;
 	return 0;
 }
@@ -2546,18 +2504,12 @@ create_query_id_buf(void)
 static int
 add_query_id_context(struct kvec *iov, unsigned int *num_iovec)
 {
-	struct smb2_create_req *req = iov[0].iov_base;
 	unsigned int num = *num_iovec;
 
 	iov[num].iov_base = create_query_id_buf();
 	if (iov[num].iov_base == NULL)
 		return -ENOMEM;
 	iov[num].iov_len = sizeof(struct crt_query_id_ctxt);
-	if (!req->CreateContextsOffset)
-		req->CreateContextsOffset = cpu_to_le32(
-				sizeof(struct smb2_create_req) +
-				iov[num - 1].iov_len);
-	le32_add_cpu(&req->CreateContextsLength, sizeof(struct crt_query_id_ctxt));
 	*num_iovec = num + 1;
 	return 0;
 }
@@ -2720,6 +2672,9 @@ int smb311_posix_mkdir(const unsigned int xid, struct inode *inode,
 		rc = add_posix_context(iov, &n_iov, mode);
 		if (rc)
 			goto err_free_req;
+		req->CreateContextsOffset = cpu_to_le32(
+			sizeof(struct smb2_create_req) +
+			iov[1].iov_len);
 		pc_buf = iov[n_iov-1].iov_base;
 	}
 
@@ -2857,49 +2812,27 @@ SMB2_open_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
 		  (oparms->create_options & CREATE_NOT_FILE))
 		req->RequestedOplockLevel = *oplock; /* no srv lease support */
 	else {
-		rc = add_lease_context(server, iov, &n_iov,
+		rc = add_lease_context(server, req, iov, &n_iov,
 				       oparms->fid->lease_key, oplock);
 		if (rc)
 			return rc;
 	}
 
 	if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
-		/* need to set Next field of lease context if we request it */
-		if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
-			struct create_context *ccontext =
-			    (struct create_context *)iov[n_iov-1].iov_base;
-			ccontext->Next =
-				cpu_to_le32(server->vals->create_lease_size);
-		}
-
 		rc = add_durable_context(iov, &n_iov, oparms,
 					tcon->use_persistent);
 		if (rc)
 			return rc;
 	}
 
 	if (tcon->posix_extensions) {
-		if (n_iov > 2) {
-			struct create_context *ccontext =
-			    (struct create_context *)iov[n_iov-1].iov_base;
-			ccontext->Next =
-				cpu_to_le32(iov[n_iov-1].iov_len);
-		}
-
 		rc = add_posix_context(iov, &n_iov, oparms->mode);
 		if (rc)
 			return rc;
 	}
 
 	if (tcon->snapshot_time) {
 		cifs_dbg(FYI, "adding snapshot context\n");
-		if (n_iov > 2) {
-			struct create_context *ccontext =
-			    (struct create_context *)iov[n_iov-1].iov_base;
-			ccontext->Next =
-				cpu_to_le32(iov[n_iov-1].iov_len);
-		}
-
 		rc = add_twarp_context(iov, &n_iov, tcon->snapshot_time);
 		if (rc)
 			return rc;
@@ -2923,25 +2856,37 @@ SMB2_open_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
 			set_owner = false;
 
 		if (set_owner | set_mode) {
-			if (n_iov > 2) {
-				struct create_context *ccontext =
-				    (struct create_context *)iov[n_iov-1].iov_base;
-				ccontext->Next = cpu_to_le32(iov[n_iov-1].iov_len);
-			}
-
 			cifs_dbg(FYI, "add sd with mode 0x%x\n", oparms->mode);
 			rc = add_sd_context(iov, &n_iov, oparms->mode, set_owner);
 			if (rc)
 				return rc;
 		}
 	}
 
+	add_query_id_context(iov, &n_iov);
+
 	if (n_iov > 2) {
-		struct create_context *ccontext =
-			(struct create_context *)iov[n_iov-1].iov_base;
-		ccontext->Next = cpu_to_le32(iov[n_iov-1].iov_len);
+		/*
+		 * We have create contexts behind iov[1] (the file
+		 * name), point at them from the main create request
+		 */
+		req->CreateContextsOffset = cpu_to_le32(
+			sizeof(struct smb2_create_req) +
+			iov[1].iov_len);
+		req->CreateContextsLength = 0;
+
+		for (unsigned int i = 2; i < (n_iov-1); i++) {
+			struct kvec *v = &iov[i];
+			size_t len = v->iov_len;
+			struct create_context *cctx =
+				(struct create_context *)v->iov_base;
+
+			cctx->Next = cpu_to_le32(len);
+			le32_add_cpu(&req->CreateContextsLength, len);
+		}
+		le32_add_cpu(&req->CreateContextsLength,
+			     iov[n_iov-1].iov_len);
 	}
-	add_query_id_context(iov, &n_iov);
 
 	rqst->rq_nvec = n_iov;
 	return 0;